Boiler Water Treatment

Transcription

1 Boiler Water Treatment Preventive Solutions and Complete Treatment Programs Corrosion, scaling and deposition can reduce the operating efficiency of the boiler and all the systems connected to the water/steam cycle of the boiler. It will reduce heat transfer rates, cause equipment and piping failure, and increase fuel costs. Hydrex TM is one tool Veolia Water Solutions & Technologies offers to prevent these problems. Hydrex TM range offers the 1000 Series of high performance chemical formulations for high pressure boilers, medium and low pressure boilers, and hot water generators. Small < 8 T/hr (17,000 lb/hr) steam Medium: 8 to 115 T/hr (17,000 lb/hr to 250,000 lb/hr) Large > 115 T/hr (250,000 lb/hr) Hydrex TM Corrosion inhibitors Resin cleaners Antifoams Descalants Dispersants 1000 SERIES A global offer Our industrial water treatment specialists can provide you with efficient boiler feed water pretreatment technologies such as: Reverse osmosis to reduce chemical demand and reduce scaling and corrosion risk Softeners for lower pressures systems Demineralization for high pressure systems Scale Thickness in mm Fuel Loss % 4 % 7 % 11 % 18 % Scale Thickness (mm) Boiler Scale vs Fuel Efficiency Loss 3.2 mm 1.6 mm 0.8 mm 0.4 mm Average Fuel Efficiency Loss (%) Hydrex TM products are especially formulated to optimize the operation of boilers: Internal treatment with control of scale forming minerals, sludge conditionners, ph and oxygen scavengers Condensate steam treatment with Hydrex TM specialty chemicals Industrial heating is one of the largest industrial uses of water and can require a large volumes. Veolia Water Solutions & Technologies also develops efficent water reuse solutions to produce large volumes of cost effective boiler feed water.

2 A Global Packaged Offering for Boiler Water Treatment >>> Enhancing / restoring efficiency of boilers >>> Maintaining boiler integrity >>> Ensuring safe and cost-effective operation Veolia Water Solutions & Technologies can provide you with an efficient and complete boiler treatment program, including Hydrex TM 1000 Series, the high performance chemical product line for boiler and heating applications. Boiler Treatment Program Pretreatment (Softeners, reverse osmosis,...) Hydrex Internal treatment Hydrex Amine feed Steam Process Deaerator Condensate returns Boiler Condensate receiver Hydrex Oxygen scavenger Blowdown Hydrex TM is available worldwide Contact your local Veolia representative for more information.

3 Cooling Water Treatment Preventive Solutions and Complete Safety Programs Closed systems from less than 100 m 3 /hr to 550 m 3 /hr Open systems from 250 m 3 /hr to more than 100,000 m 3 /hr Scale deposit, corrosion, fouling and biological proliferation can cause system downtime, loss of equipment efficiency, replacement of equipment, and can increase the risk of disease from pathogenic micro-organisms. In addition to supplying water treatment equipment, Veolia Water Solutions & Technologies provides a set of services allowing us to guarantee the reliable running of all your cooling water installations. Hydrex range offers two advanced series of high performance chemical formulations for the treatment of open and closed cooling systems. Hydrex TM series SERIES Scale Inhibitors: phosphorus and non-phosphorus based products, homopolymeric dispersants and high performance polymers Corrosion inhibitors: anodic, cathodic, organic Biodispersants Cooling tower cleaning agents A total solution The VWS industrial water treatment specialists can provide you with: Sidestream filtration technologies from multimedia filters to membranes Chemical feed Control of cycles (scale and corrosion control devices) and chemical level for your cooling systems. Industrial cooling is one of the most widely used industrial processes, and requires large volumes of water. VWS develops efficent water reuse solutions to produce large volumes of cooling make-up water for less cost to industries. Hydrex TM series SERIES Oxidizing and non-oxidizing biocides for Legionella control and bio-fouling

4 A Global Packaged Offering for Cooling Water Treatment >>> Enhancing / restoring efficiency of cooling water systems >>> Maintaining cooling water systems integrity >>> Ensuring safe and cost-effective operation Legionella Control Hydrex TM provides the Legionella program to secure your facility and process: methodical analysis of risks, revamping of cooling water systems in accordance with regulation, analytical survey, technical assistance, cleaning of cooling towers and circuits, training, preventive treatment, extensive research & development programs, An example of a Cost Effective Program For a closed circuit equipped with cooling towers Make-up water is: surface water, Ryznar Index 6, untreated water. Fouling of the packing had been observed after a few years of operation. The client had to decrease temperature of the circuit to avoid fouling. Production losses were very important. With Hydrex TM, the annual cost of treatment now represents only 10 % of the previous loss of production per year. Cooling Treatment Program Cooling tower PROCESS Heat Exchanger Makeup Hydrex Treatment Blowdown Controller Hydrex Treatment Hydrex TM is available worldwide Contact your local Veolia representative for more information. Pump

5 Protection of your RO plants Preventive Solutions and Safety Programs The Hydrex TM 4000 range is specifically formulated for membrane treatment systems. The Hydrex TM products keep the membranes free of scale and bacterial growth and aid in extending membrane life. Hydrex TM chemicals optimize operational costs, protect the expensive membrane modules and ensure smooth, efficient operation. The Hydrex TM 4000 range is approved by leading international membrane manufacturers for use with their products. Hydrex TM Scale inhibitors - Phosphonate - Polycarboxylic polymers, sulfonated polymers Biocides - Isothiazolone, DBNPA 4000 SERIES Cleaning - Alkaline cleaners, acidic cleaners Veolia Water Solutions &Technologies offers the right Hydrex TM range including chlorination and de-chlorination agents, disinfectants, antiscalants and cleaners for all types of membranes: Reverse osmosis Nanofiltration Ultrafiltration Microfiltration Example of Hydrex TM products: Hydrex TM 4101 is a scale inhibitor for calcium carbonate and calcium sulphate. Hydrex TM 4102 is a scale inhibitor for calcium carbonate. Hydrex TM 4109 is a scale inhibitor for water with high silica content. Hydrex TM 4101, 4102, 4103, 4105, 4109 products are ANSI/NSF60 approved.

6 A Global Packaged Offering for Reverse Osmosis >>> Laboratory services >>> Specific software for RO applications Balancing the ionic composition of the feed water Determining scaling potential of various salts at designed recovery and ph Offering options of Hydrex TM products to be used to prevent scale formation Defining dosage of chosen Hydrex TM product Generating final report. >>> Membrane autopsy The physical dissection of an RO membrane and the laboratory analysis of its foulants can be one of the most definitive methods of troubleshooting an RO system. A Hydrex TM autopsy includes a wide range of procedures. External and internal visual examination Test of the element performance Chemical identification of the surface foulants Loss on ignition test Cell and dye test Summary and recommandation >>> Test rig for selection of cleaners Proposing preventive/ corrective cleaning sequences adapted to fouling. Hydrex TM is available worldwide Contact your local Veolia representative for more information.

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8 Preneutralization tank 6.6 m 3 Coagulant + Lime Flocculation tank 5.05 m 3 Flocculant Recovery tank 20 m 3 (drainage from the scrubbers, wash water, filtrates from the filter press) Filter press Static thickener 32 m 3 Neutralization tank 6.6 m 3 Lime + Insolubilizer Recirculation of sludge Removal of sludge Decantation 52.2 m 3 Discharge Check ph, temperature and flow rate Cooling of the effluents 2 plate exchangers Returned to ph 3 m 3 Hydrochloric acid